package com.example.demo1.service;


import com.example.demo1.entity.Comment;
import com.example.demo1.repository.CommentRepository;
import lombok.AllArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;

@Service
public class CommentService {
//    @Autowired
//    CommentRepository commentRepository;
//
//    public void SelectCommentById(Integer id){
//        Optional<Comment> comment = commentRepository.findById(id);
//        if(comment.isPresent())
//            System.out.println(comment.get());
//        else
//            System.out.println("not found");
//    }
//
//    public List<Comment> SelectAllSortById(){
//        return commentRepository.findAll(Sort.by(Sort.Direction.ASC,"aId"));
//    }
//
//    public List<Comment> SelectAllPage(int page,int size){
//        Pageable pageable = PageRequest.of(page,size);
//        return commentRepository.findAll(pageable).getContent();
//    }
//
//    public void addComment(String content,String author,Integer aId){
//        Comment comment = new Comment();
//        comment.setaId(aId);
//        comment.setContent(content);
//        comment.setAuthor(author);
//        commentRepository.save(comment);
//
//    }
//
//    public List<Comment> SelectByExample(String author){
//        Comment comment = new Comment();
//        comment.setAuthor(author);
//        //返回的是地址
//        return commentRepository.findAll(Example.of(comment));
//    }
//
//    //分页
//    public List<Comment> findAllPage(int page,int size){
//        Pageable pageable = PageRequest.of(page,size);
//        return commentRepository.findAll(pageable).getContent();
//    }


}
